| This `./upstream` subdolder contains fixes for `FindCUDA` that are introduced in |
| later versions of cmake but cause generator expression errors in earlier CMake |
| versions. Specifically: |
| |
| 1. a problem where a generator expression for include directories was |
| passed to NVCC, where the generator expression itself was prefixed by `-I`. |
| As the NNPACK include directory generator expression expands to multiple |
| directories, the second and later ones were not prefixed by `-I`, causing |
| NVCC to return an error. First fixed in CMake 3.7 (see |
| [Kitware/CMake@7ded655f](https://github.com/Kitware/CMake/commit/7ded655f)). |
| |
| 2. Windows VS2017 fixes that allows one to define the ccbin path |
| differently between earlier versions of Visual Studio and VS2017. First |
| introduced after 3.10.1 master version (see |
| [Kitware/CMake@bc88329e](https://github.com/Kitware/CMake/commit/bc88329e)). |
| |
| The downside of using these fixes is that `./upstream/CMakeInitializeConfigs.cmake`, |
| defining some new CMake variables (added in |
| [Kitware/CMake@48f7e2d3](https://github.com/Kitware/CMake/commit/48f7e2d3)), |
| must be included before `./upstream/FindCUDA.cmake` to support older CMake |
| versions. A wrapper `./FindCUDA.cmake` is created to do this automatically, and |
| to allow submodules to use these fixes because we can't patch their |
| `CMakeList.txt`. |
| |
| If you need to update files under `./upstream` folder, we recommend you issue PRs |
| against [the CMake mainline branch](https://gitlab.kitware.com/cmake/cmake/tree/master/Modules/FindCUDA.cmake), |
| and then backport it here for earlier CMake compatibility. |
